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ARM: dts: rockchip: enable adc key for rk3288-evb 

rk3288-evb have many tablet-used adc buttons.

Signed-off-by: Jacob Chen <jacob-chen@iotwrt.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Jacob Chen 2017-07-01 10:02:47 +08:00 committed by Heiko Stuebner
parent 849f055381
commit ef93f7518f
1 changed files with 37 additions and 0 deletions
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37
arch/arm/boot/dts/rk3288-evb.dtsi
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@ -48,6 +48,43 @@
reg = <0x0 0x80000000>;
};
adc-keys {
compatible = "adc-keys";
io-channels = <&saradc 1>;
io-channel-names = "buttons";
keyup-threshold-microvolt = <1800000>;
button-up {
label = "Volume Up";
linux,code = <KEY_VOLUMEUP>;
press-threshold-microvolt = <100000>;
};
button-down {
label = "Volume Down";
linux,code = <KEY_VOLUMEDOWN>;
press-threshold-microvolt = <300000>;
};
menu {
label = "Menu";
linux,code = <KEY_MENU>;
press-threshold-microvolt = <640000>;
};
esc {
label = "Esc";
linux,code = <KEY_ESC>;
press-threshold-microvolt = <1000000>;
};
home {
label = "Home";
linux,code = <KEY_HOME>;
press-threshold-microvolt = <1300000>;
};
};
backlight: backlight {
compatible = "pwm-backlight";
brightness-levels = <